User's Manual

SIM548C EVB User Guide
SIM548C-EVB_ UGD _V1.01 04.05.2008
7
B5: GPS TX/RX status
C1-C9: Key control for various functions
C1: GSM part power-up / power down control (button Z101)
C2: VBAT ON/OFF control (shifter S102)
C3: VCHG ON/OFF control (shifter S105)
C4: GSM part program download control (shifter S101)
C5: GPS part power ON/OFF control (shifter S107)
C6: GPS part reset control (button Z102)
C7: GPS part RX/TX LED status selective shifter (shifter S106)
C8: GPS part wake up control (shifter S103)
C9: GPS part program download control (shifter S104)
D: Power source adapter interface
E1-E3: Audio interface
E1: Handset interface
E2: Headphone interface
E3: Buzzer
F1-F4: Serial ports
F1: Main serial port for downloading, AT command transmitting, data exchanging
F2: Debug serial port
F3: GPS part serial port A
F4: GPS part serial port B
G1-G2: Hole for antenna fixed
G1: Hole for GSM antenna fixed
G2: Hole for GPS antenna fixed
H: Expand port, such as serial ports, display port
I1-I4: Hole for EVB board fixed
K: SIM card connector
L: 3.3V Back-up battery for GPS part